One more thing: If you have a copy of the Official Record of the War of Rebellion on cd rom, you may be able to do a search by location (i.e. search for Wyoming County or Turkey Wallow Hollow) ....If you don't have a copy, "google" the O.R.'s (or a variation or the whole title. Every once in a while, you can find an on-line database that is searchable, but I don't believe it to be as reliable as having the cdrom

I think the main problem you will have is that there were over 10,000 engagements during the war, most of them VERY minor and thus of little note. If the OR's show nothing, contact the local Historical Societies to see if they have any info on troop activities, camps, engagements, etc....
Again, good luck!!